I understand the need for discretion, so if there are no full face shots that's understandable, although you would expect punters choose because they're attracted to the wg, so it can't help in the "selling"process, but profiles that don't actually have any nudity seem a bit odd, it's the wrong profession if you're prudish, and doesn't exactly bode well for any encounter, you'd be half expecting to be asked if it was okay if she turned the lights off! A hint of nudity, perhaps underwear or something slightly seth rough in free and fully naked in private, I don't think penetration shots are necessary.
Obviously if there's some sort of fetish being advertised that should be shown in the pictures somewhere.
At the end of the day the profile is your advert, you wouldn't expect clothes retailers to advertise "fantastic red dress" and then expect you to buy it before you've seen it, or just a couple of out of focus pictures of the hem, the sleeve and the washing instructions.